Flexible Piezoionic Strain Sensors toward Artificial Intelligence Applications

Flexible piezoionic strain sensors are playing an important role in the field of smart electronic and artificial intelligence. The high sensitivity and superior flexibility make It possible to detect various strain and stress from macro- to microscale precisely. Here, recent progress on flexible piezoionic strain sensors has been summarized into several sections, including sensing mechanism, material engineering, and smart applications. In each section, we present typical scientific works and discuss corresponding critical results. This Account aims to provide broad views for researchers with different academic backgrounds, and then promotes the development of flexible piezoionic strain sensors. Finally, existing challenges and opportunities have been presented to expedite further research works and practical applications of flexible piezoionic strain sensors.